Carnival's "Paradise" used to be a non-smoking ship, but unfortunately that policy was discontinued last year. Also the now-defunct Renaissance Cruises had non-smoking ships.

Today, Oceania Cruises has what is perhaps the most non-smoker-friendly policy in the idustry. Smoking is prohibited throughout the ships with the exception of a tiny corner at the back of the observation lounge, and in a small section of the pool deck.

yes - it was financially motivated, from what I have heard. I understand that passengers on "Paradise" on average spent less money onboard (lower onboard revenue). I don't know why, but this is what I have been told.

I really liked the idea of a non-smoking ship, but then it always comes down to the financial success in the end.